Gravatar images in WordPress sites don`t have alt and title tags, with this plugin you can resolve this problem on your site.

Gravatar SEO

A light and simple plugin to insert automatically ALT & TITLE tags into Gravatar images in your site.

Andrew Gunn

RyanVanEss

Orion Group LLC

Mitch Menghi

Auto generate clean ALT tags for your images as they are uploaded. Automatically removes hyphens, periods and other characters to generate clean alt tag names. 
SEO Auto Image Tags automatically updates the title and alt tag for every image uploaded with a clean Title Case version of the file name! Don’t waste your time manually craeting SEO Friendly Tags, let SEO Auto Image Tags do the work for you! 
You can run the database updater to create, update, or delete image tag data for all images in the media library. All with a lightweight and efficient clientside script to EVERY image is properly tagged.

SEO Auto Image Tags

Auto generate clean ALT tags for your images as they are uploaded. Removes hyphens, periods and other characters to generate clean alt tag names.

Gravatar SEO vs SEO Auto Image Tags